The BTL Mark on GW-BAC1 is a symbol that indicates that a product has passed a
series of rigorous tests conducted by an independent laboratory which verifies that
the product correctly implements the BACnet features claimed in the listing.
The mark is a symbol of a high-quality BACnet product.
Go to http://www.bacnetinternational.net/btl/ for more information about the
BACnet Testing Laboratory.